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- W2563534138 abstract "Despite the central role of alternative sigma factors in bacterial stress response and virulence their regulation remains incompletely understood. Here we investigate one of the best-studied examples of alternative sigma factors: the σB network that controls the general stress response of Bacillus subtilis to uncover widely relevant general design principles that describe the structure-function relationship of alternative sigma factor regulatory networks. We show that the relative stoichiometry of the synthesis rates of σB, its anti-sigma factor RsbW and the anti-anti-sigma factor RsbV plays a critical role in shaping the network behavior by forcing the σB network to function as an ultrasensitive negative feedback loop. We further demonstrate how this negative feedback regulation insulates alternative sigma factor activity from competition with the housekeeping sigma factor for RNA polymerase and allows multiple stress sigma factors to function simultaneously with little competitive interference." @default.
- W2563534138 created "2017-01-06" @default.
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- W2563534138 date "2016-12-15" @default.
- W2563534138 modified "2023-10-18" @default.
- W2563534138 title "Role of Autoregulation and Relative Synthesis of Operon Partners in Alternative Sigma Factor Networks" @default.
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- W2563534138 doi "https://doi.org/10.1371/journal.pcbi.1005267" @default.
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